Phonon Conduction in Polyethylene
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概要
- 論文の詳細を見る
The thermal diffusivity in polyethylene has been measured by the laser-flashmethod at temperatures between 2 K and 300 K. Heavily oriented specimens wereprepared by an extrusion method, and the diffusivities in the specimens in the direc-lions perpendicular and parallel to the oriented molecular chains, D. and D, andalso the diffusivity in unextruded specimen, D(, were measureci. A large anisotropywas shown in the thermal diffusivity, namely, D.<D.<D, at all temperatures, andthe dependences of the diffusivities D., D., and D, on temperature were found to bedifferent. The experimental results could well be explained by considering that three-dimensional Debye phonons conducted both in crystalline and amorphous parts, andone-dimensional phonons could conduct along the long molecular chains; and thatthe Umklapp and the boundary scattering were dominant for the crystalline three-dimensional phonons, the one-dimensional phonons were scattered by scatterers onthe chains, and the conducting phonons in the amorphous parts might be scattered bylow-energy localized excitations.
- 社団法人日本物理学会の論文
- 1988-06-15
著者
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中村 裕之
Graduate School Of Material Science University Of Hyogo
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川崎 恭治
福岡工業大学エレクトロニクス研究所
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Hiki Y
Faculty Of Science Tokyo Institute Of Technology Tokyo
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Hiki Yosio
Faculty Of Engineering Ibaraki University
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NAKAMURA Hiroaki
Central Research Laboratories, Idemitsu Kosan Co., Ltd.
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KOGURE Yoshiaki
Faculty of Science,Tokyo Institute of Technology
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KAWASAKI Kenji
Central Research Laboratories, Idemitsu Kosan Co., Ltd.
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MUGISHIMA Toshio
Faculty of Science,Tokyo Institute of Technology
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Mugishima Toshio
Faculty Of Science Tokyo Institute Of Technology
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Kogure Yoshiaki
Faculty Of Science And Engineering Teikyo University Of Science & Technology
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Nakamura Hiroaki
Central Research Laboratories Idemitsu Kosan Co. Ltd.
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HIKI Yosio
Faculty of Science, Tokyo Institute of Technology, Tokyo
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Hiki Yosio
Faculty of Engineering, Ibaraki University
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